<?php

namespace app\admin\controller\book;

use app\common\controller\Backend;
use think\Db;
use think\exception\DbException;
use think\exception\PDOException;
use think\exception\ValidateException;
use think\response\Json;

/**
 * 教材章节管理
 *
 * @icon fa fa-circle-o
 */
class Unit extends Backend
{

    /**
     * Unit模型对象
     * @var \app\admin\model\book\Unit
     */
    protected $model = null, $searchFields = 'title,subtitle';

    public function _initialize()
    {
        parent::_initialize();
        $this->model = new \app\admin\model\book\Unit;
        $this->view->assign("statusList", $this->model->getStatusList());
    }



    /**
     * 默认生成的控制器所继承的父类中有index/add/edit/del/multi五个基础方法、destroy/restore/recyclebin三个回收站方法
     * 因此在当前控制器中可不用编写增删改查的代码,除非需要自己控制这部分逻辑
     * 需要将application/admin/library/traits/Backend.php中对应的方法复制到当前控制器,然后进行修改
     */

	/**
     * 查看
     *
     * @return string|Json
     * @throws \think\Exception
     * @throws DbException
     */
    public function index($book_id = null)
    {
        //设置过滤方法
        $this->request->filter(['strip_tags', 'trim']);
        if (false === $this->request->isAjax()) {
			$this->assignconfig('book_id', $book_id);
            return $this->view->fetch();
        }
        //如果发送的来源是 Selectpage，则转发到 Selectpage
        if ($this->request->request('keyField')) {
            return $this->selectpage();
        }
        [$where, $sort, $order, $offset, $limit] = $this->buildparams();
		$filter_w = [];
		if($book_id) $filter_w['book_id'] = $book_id;
        $list = $this->model->with(['book'])
            ->where($where)->where($filter_w)
            ->order($sort, $order)
            ->paginate($limit);
        $result = ['total' => $list->total(), 'rows' => $list->items()];
        return json($result);
    }

	/**
     * 添加
     *
     * @return string
     * @throws \think\Exception
     */
    public function add()
    {
        if (false === $this->request->isPost()) {
            return $this->view->fetch();
        }
        $params = $this->request->post('row/a');
        if (empty($params)) {
            $this->error(__('Parameter %s can not be empty', ''));
        }
        $params = $this->preExcludeFields($params);

        if ($this->dataLimit && $this->dataLimitFieldAutoFill) {
            $params[$this->dataLimitField] = $this->auth->id;
        }
        $result = false;
        Db::startTrans();
        try {
            //是否采用模型验证
            if ($this->modelValidate) {
                $name = str_replace("\\model\\", "\\validate\\", get_class($this->model));
                $validate = is_bool($this->modelValidate) ? ($this->modelSceneValidate ? $name . '.add' : $name) : $this->modelValidate;
                $this->model->validateFailException()->validate($validate);
            }
            $result = $this->model->allowField(true)->save($params);

			//如果存在附件
			if (isset($params['files'])&&$params['files']) {
				$images = explode(",", $params['files']);
				//获取附件名称集合
				$attachments = \app\common\model\Attachment::where('url', 'in', $images)->column('filename', 'url');
				$files_data = array();
				foreach ($images as $key => $v) {
					$files_data[$key]['url'] = $v;
					$files_data[$key]['admin_id'] = $this->auth->id;
					$files_data[$key]['book_id'] = $params['book_id'];
					$files_data[$key]['unit_id'] = $this->model->id;
					$files_data[$key]['filename'] = isset($attachments[$v]) ? $attachments[$v] : $v;
				}
				$this->model->files()->saveAll($files_data);
			}

            Db::commit();
        } catch (ValidateException|PDOException|Exception $e) {
            Db::rollback();
            $this->error($e->getMessage());
        }
        if ($result === false) {
            $this->error(__('No rows were inserted'));
        }
        $this->success('',url('book.unit/index',['book_id'=>$this->model->id]));
    }
}